Answer: She had 20 gallons to begin with.
Step-by-step explanation:
16 = 6 + 1/2x
x = the amount she had to start with
Subtract 6 from each side
10 = 1/2x
Divide each side by 1/2
20 = x
Answer:
The radius is 25 cm
A
Step-by-step explanation:
Area =
* r^2
Area = 625 *
625 = * r^2 The s cancel out
r^2 = 625 Take the square roots of both sides
sqrt(r^2) = sqrt(625)
r = 25
It will take them 5 Hours to charge the same. The rental charge will be 510.
I did a manual computation per company: My computation is entirely based on trial and error.
Red Bus Co. has a fixed rental rate of 150 and additional rental of 72 per hour while Blue Bus Co. has a fixed rental rate of 240 and additional rental of 54 per hour. Both fixed rental rate are one time charges only and total rental will vary on the number of hours spent in using both vehicles.
Let's start with the Red Bus Co. I will be posting the charges per hour and its running balance. The running balance is the sum.
Fixed Rate 150 Running Balance: 150 => 150 + 0
Hr 1 72 222 => 150 + 72
Hr 2 72 294 => 222 + 72
Hr 3 72 366 => 294 + 72
Hr 4 72 438 => 366 + 72
Hr 5 72 510 => 438 + 72
I'll do the same process with Blue Bus Co.
Fixed Rate 240 Running Balanc: 240 => 240 + 0
Hr 1 54 294 => 240 + 54
Hr 2 54 348 => 294 + 54
Hr 3 54 402 => 348 + 54
Hr 4 54 456 => 402 + 54
Hr 5 54 510 => 456 + 54
Answer:
x =-2
Step-by-step explanation:
log 15 = log(7 - 4x)
The terms inside the log functions must be the same
15 = 7 -4x
Subtract 7 from each side
15-7 = 7-4x-7
8 = -4x
Divide each side by -4
8/-4 =-4x/-4
-2 =x
